42125125111 has 4 divisors (see below), whose sum is σ = 42125562792. Its totient is φ = 42124687432.

The previous prime is 42125125073. The next prime is 42125125123. The reversal of 42125125111 is 11152152124.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42125125111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42125125151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4480 + ... + 290293.

It is an arithmetic number, because the mean of its divisors is an integer number (10531390698).

Almost surely, 2^42125125111 is an apocalyptic number.

42125125111 is a deficient number, since it is larger than the sum of its proper divisors (437681).

42125125111 is a wasteful number, since it uses less digits than its factorization.

42125125111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437680.

The product of its digits is 800, while the sum is 25.

Adding to 42125125111 its reverse (11152152124), we get a palindrome (53277277235).

The spelling of 42125125111 in words is "forty-two billion, one hundred twenty-five million, one hundred twenty-five thousand, one hundred eleven".